diff options
Diffstat (limited to 'Master/tlpkg/tlperl/lib/Math/BigFloat/Trace.pm')
-rwxr-xr-x | Master/tlpkg/tlperl/lib/Math/BigFloat/Trace.pm | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/Master/tlpkg/tlperl/lib/Math/BigFloat/Trace.pm b/Master/tlpkg/tlperl/lib/Math/BigFloat/Trace.pm new file mode 100755 index 00000000000..871b2a969e8 --- /dev/null +++ b/Master/tlpkg/tlperl/lib/Math/BigFloat/Trace.pm @@ -0,0 +1,58 @@ +#!/usr/bin/perl -w + +package Math::BigFloat::Trace; + +require 5.005_02; +use strict; + +use Exporter; +use Math::BigFloat; +use vars qw($VERSION @ISA $PACKAGE @EXPORT_OK + $accuracy $precision $round_mode $div_scale); + +@ISA = qw(Exporter Math::BigFloat); + +$VERSION = 0.01; + +use overload; # inherit overload from BigFloat + +# Globals +$accuracy = $precision = undef; +$round_mode = 'even'; +$div_scale = 40; + +sub new +{ + my $proto = shift; + my $class = ref($proto) || $proto; + + my $value = shift; + my $a = $accuracy; $a = $_[0] if defined $_[0]; + my $p = $precision; $p = $_[1] if defined $_[1]; + my $self = Math::BigFloat->new($value,$a,$p,$round_mode); + +# remember, downgrading may return a BigInt, so don't meddle with class +# bless $self,$class; + + print "MBF new '$value' => '$self' (",ref($self),")"; + return $self; +} + +sub import + { + print "MBF import ",join(' ',@_); + my $self = shift; + + # we catch the constants, the rest goes go BigFloat + my @a = (); + foreach (@_) + { + push @a, $_ if $_ ne ':constant'; + } + overload::constant float => sub { $self->new(shift); }; + + Math::BigFloat->import(@a); # need it for subclasses +# $self->export_to_level(1,$self,@_); # need this ? + } + +1; |